The IBM POWER4 was released in 2001. It was a 1.1-1.9GHz dual core processor widely used in IBM’s server line including the RS/6000 and AS/400. It can be commonly found as a single chip dual core, but also as a large MCM containing 4 POWER4 dies. These MCMs include a very large and heavy aluminium heatsink attached to a solid copper housing. The complete unit weighs in at a hefty 3kg. The heatsink and housing can be removed revealing a 230 gram MCM (with its small heat spreaders).

To disassemble one of these you will need a variety of tools. A 4 mm socket, hex bits (2.5, 3 and 4mm), T8 torx bit , a medium flat tip screw driver, gloves and a good heat source (I use a propane torch)

First remove the 4 T8 torx screws that hold the interposer to the module. It gets in the way and can melt easily. Also remove the 8 3mm screws around the perimeter. These hold the aluminium heatsink to the copper housing.

The Largest CPU Museum!

In my daily hunt for new processors, and other chips for the museum, as well as information about new chips, I constantly come across interesting chips, in strange locations. Here you will get a chance to learn WHERE many of the chips in the museum come from and what they are.